The Stg2 motor is same that is in mine minus heads and orings and Brett's original motor was the same but Stg1 Socal heads without orings. We went to orings because twins or high hp levels cause the cheaper studs and gaskets to move around and leak boost into the cooling system. Can you do it without, sure can and many do but I don't like to take the risk anymore. Guys like Kyle Harbin, Mike M., myself, and more had headgasket issues when they got into the twins at higher hp levels. I would rather build it for more than you need then not have enough for what you are going to do to it, cheaper in the long run to do it right the first time!:thumb:
Thanks for the kind words guys, I do my very best to take care of my guys!